Determine sequence of modulation frequencies, Electrical Engineering

Assignment Help:

The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.


Related Discussions:- Determine sequence of modulation frequencies

#complex frequency.., i cant imagine of something called complex frequency....

i cant imagine of something called complex frequency...i find it important for laplace transformation,but i am lacking the physical explanation,please explain this to me

D.c machine, What are the advantages of distributing windings in an alterna...

What are the advantages of distributing windings in an alternator?

Circuit, y more number of resistance and capacitor are used in a circuit w...

y more number of resistance and capacitor are used in a circuit what is the purpose to add ore than one..?

Representation of negative number, Representation of Negative Number: ...

Representation of Negative Number: As  mentioned  in chapter 1 in 8085  negative  numbers are represented in 2 complement  form  and subtraction is  performed  using 2  comple

Latch - introductio to microprocessors , Latch A 8 bit  latch comprise...

Latch A 8 bit  latch comprises of transparent latch D flip  flop. It is commonly  used  to interface output  device with  microprocessor. A typical example of such 8 bit  latc

Describe abrasive grit size, Describe the effect of following parameters. ...

Describe the effect of following parameters. Abrasive grit size. Amplitude and frequency of vibration.

Explain superconductivity, Explain Superconductivity. Superconductiv...

Explain Superconductivity. Superconductivity - The resistivity of most metals rises with rise in temperature and vice-versa. There are several metals and chemical compounds

What are multistageand single stage networks, Q. What are multistageand sin...

Q. What are multistageand single stage networks? Compare strengths and weaknesses of each. OR List the key difference in single stage, two stage and three stage Networks. A

Digital switching switching in telecommunication, Name the switching scheme...

Name the switching schemes used in a digital exchange

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd